Optimal power allocation for relay-based cooperative communication systems with energy harvesting
| Autor: | Mohammad Javad Omidi, Arin Minasian, Hamid Saeedi-Sourck, Marzieh Ajirak |
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| Rok vydání: | 2017 |
| Předmět: |
Mathematical optimization
Engineering business.industry 020206 networking & telecommunications 02 engineering and technology Communications system law.invention Relay law Convex optimization 0202 electrical engineering electronic engineering information engineering Markov decision process Electrical and Electronic Engineering business Energy source Energy harvesting Energy (signal processing) Computer Science::Information Theory Communication channel |
| Zdroj: | Transactions on Emerging Telecommunications Technologies. 28:e3144 |
| ISSN: | 2161-3915 |
| DOI: | 10.1002/ett.3144 |
| Popis: | In this paper, the problem of throughput maximization in cooperative communication systems is considered, in which the nodes use energy harvesters instead of conventional energy sources. The 3-node Gaussian relay channel with decode-and-forward relaying scheme is investigated, where the source and relay harvest energy from the environment. In this work, optimal power levels for 2 cases are obtained. First, a deterministic model is considered, where the noncausal (offline) knowledge of the harvested energy and channel states is available. The problem is shown to be a convex optimization problem, where the solutions to which are derived using convex optimization techniques. Then, the online case is investigated, in which only the casual knowledge of the harvested energy and channel states are used. In the online setting, the problem is formulated as a Markov decision process. The performance of the system in both offline and online cases, along with a few suboptimal schemes introduced in the literature, is evaluated using computer simulations. |
| Databáze: | OpenAIRE |
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